Typical Wiring Schematic, Outdoor-Fan Motor

120-548F036	TYPICAL WIRING SCHEMATIC (cont)
	7 1/2 AND 8 1/2 TON UNITS ONLY

LEGEND

AHA — Adjustable Heat Anticipator

AWG — American Wire Gage

C— Contactor, Compressor

CAP — Capacitor

CB — Circuit Breaker

CC— Cooling Capacitor

CH — Crankcase Heater

CLO — Compressor Lockout COMP — Compressor Motor

D— Diode

DB	— Defrost Board
DFT	— Defrost Thermostat
EC	— Enthalpy Control
ECON	— Economizer
EPS	— Emergency Power Supply
	(Nine-Volt Battery)
EQUIP	— Equipment
ER	— Economizer Relay
FPT	— Freeze-Up Protection
	Thermostat
FU	— Fuse
GND	— Ground
HC	— Heater Contactor (Strip Heat)
HPS	— High-Pressure Switch
HR	— Heater Relay
IFC	— Indoor-Fan Contactor
IFM	— Indoor-Fan Motor
IFMOVL — Indoor-Fan Motor
	Overload Switch
LPS	— Low-Pressure Switch
LSM	— Limit Switch (Manual Reset)
MCA	— Minimum Circuit Amps
MTR	— Motor
OAT	— Outdoor-Air Thermostat
OFC	— Outdoor-Fan Contactor
OFM	— Outdoor-Fan Motor

P— Plug

PL — Plug Assembly

QT — Quadruple Terminal

R— Relay

	RED	24VAC
ACTUATOR	BRN	24COM
50DK509044	GRN	GND
	GRY	CL01
	ORN	CL02
		STEPPER DRIVE	50DK508232
		B1
	BLU	Y1
	YEL	Y2
	BLK	G
		AO
		COM

	CONFIG					STATUS
-1
AD-DME1711	20 0		60	100 80	MIN POS(X)
		40
	B			C	ECON
EconoMi$er	A		30º	D	ECON	SP
EconoMi$er	800	OFF	30º	12001400	SPCOMECHCLG	(PPM)LOCKOUT
		º20		º 40
	º 10			º 40
				º 50
	1000

		50DK508234
OAT	TAN	OAT
COM	VIO
OAH	WHT
+15V	RED
RAT	TAN
COM	VIO
RAM	WHT
+15V	RED
CO2 +		RAT
CO2 +

CO2 (COM)

DAT VIO

COM PNK

REM POT

COM

LED

COMFIELD INSTALLED

OPTION

AIR ENTHALPY

USED FORMOUTDOOR

VIO WHT RED

RED

BLU

BLK

3 BRN 4

GRY 5 VIO 6

PNK

7 YEL 8 ORN 9

PL6

RAT	— Return-Air Thermostat
RVS	— Reversing Valve Solenoid
SAT	— Supply-Air Thermostat
SW1	— Switch Fully Open
SW2	— Switch Fully Closed
SW3	— Switch Min. Vent Position
SW4	— Switch Max. Vent Position
TB	— Terminal Block
TC	— Thermostat-Cooling
TH	— Thermostat-Heating
TRAN	— Transformer
	Field Splice
	Marked Wire
	Terminal (Marked)
	Terminal (Unmarked)
	Terminal Block
	Splice
	Splice (Marked)

12-PIN

		WHT/YEL	FEMALE
		BLK/YEL	12	8	4
			12	8	4
	1	WHT/GRY	11	7	3
	1
3-PIN	2	BLK/GRY	10	6	2
MOLEX	2
MOLEX		BRN	9	5	1
	3	BRN	9	5	1
	3	NOT USED	MOLEX
		NOT USED	MOLEX

CONNECTOR

CONNECTOR CABLE

548F090-120

Factory Wiring

Field Control Wiring

Field Power Wiring

Accessory or

Optional Wiring

To indicate common

potential only. Not to

represent wiring.

549B, 548F, 542J specifications

Bryant 542J is a high-efficiency gas furnace that stands out for its reliability and advanced heating technologies. Designed to deliver consistent warmth and comfort in residential settings, it combines innovative engineering with energy-efficient features.

One of the key characteristics of the Bryant 542J is its two-stage heating capability. This means that the furnace can adjust its heat output according to the heating demands of your home. During milder weather, it operates at a lower stage, consuming less energy while still maintaining a comfortable environment. When the temperatures drop, the furnace shifts to its higher capacity, providing the necessary warmth efficiently. This not only enhances comfort but also contributes to lower energy bills.

In addition to its two-stage operation, the Bryant 542J also incorporates a variable-speed blower motor. This technology allows the furnace to adjust the airflow depending on the heating requirements, ensuring an even distribution of warm air throughout the home. The variable-speed blower also operates more quietly than conventional fixed-speed motors, creating a serene indoor environment.

Energy efficiency is a hallmark of the Bryant 542J, boasting an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96.5%. This impressive rating means that a significant portion of the energy consumed is effectively converted into usable heat, resulting in substantial savings on heating costs over time. Furthermore, the furnace is equipped with a sealed combustion system that draws air from outside the home, minimizing energy waste and improving indoor air quality.

Diagnostic features are another highlight of the Bryant 542J, which come equipped with SmartEvap technology. This allows the unit to self-diagnose potential issues, providing homeowners with peace of mind and simplifying maintenance procedures.

Durability is also a key feature of the Bryant 542J. It is constructed with high-quality materials designed to withstand harsh winter conditions, ensuring a long lifespan and reliable performance. Its compact design also allows for flexible installation, making it suitable for various residential layouts.

In summary, the Bryant 542J is more than just a gas furnace; it is a sophisticated heating solution that combines efficiency, comfort, and reliability. With features such as two-stage heating, a variable-speed blower, high AFUE ratings, and advanced diagnostics, it is an excellent choice for homeowners seeking an efficient and effective heating system.

Bryant 542J, 548F, 549B manual Typical Wiring Schematic, Outdoor-Fan Motor

Models: 549B 548F 542J

TYPICAL WIRING SCHEMATIC (cont)

— Outdoor-Fan Motor

P— Plug

PL — Plug Assembly

QT — Quadruple Terminal

R— Relay

ACTUATOR

RAT

TRAN

Splice (Marked)

548F090-120

549B, 548F, 542J specifications